Previously it may be a case of gastritis and now I think its a case of URTI.
Avoid children from cold environment.
Child need some medication.
For prescription kindly contact me in my private chat window.
Thanks.

1.Reach for fluids. As with any illness, staying hydrated is your first line of defense against coughing. If your cough stems from a dry throat, a little hydration might be all you need. Even if your cough is caused by something else, drinking plenty of fluids is never a bad idea 2 Make the fluids warm. For certain coughs, such as ones caused by congestion or sinus drainage, warm liquids can be even more effective than cold or room temperature ones. 3.Try saltwater. Particularly in cases of cold- or flu-related coughs, salt water is your friend. 4.Consider steam — in some cases. Conventional wisdom often dictates that steam from a shower or a humidifier can help combat a cough; however, that’s only the case if your cough is due to dry air. If you’re coughing because of congestion, asthma, dust mites, or mold, among other causes, moist air could actually make your cough worse. 5.Stay upright. Being horizontal can cause mucus to drain into your throat. When sleeping with a cough, for example, you should prop up your head with pillows to prevent sinus drainage from pooling in your throat, causing you to cough. 6.Keep the air clean. Stay away from dirty air, including cigarette smoke.Particulates in the air could either be the source of your cough or worsen one that has other causes. Strong fragrances, such as perfumes, can cause some people to cough, even if they’re not irritating to others 7.Keep the air still. Avoid wind, ceiling fans, heaters, and air conditioners, because moving air can make coughs worse For medication consult online in private
Blow your nose sparingly. Your natural instinct may be to blow your nose when it feels blocked, but the jury's still out on whether this is actually a good idea or not. Some studies have shown that forcefully blowing your nose can actually lead to a build-up of pressure and trapped mucus in your sinuses, which may become infected.[1] On the other hand, some experts claim that it is important to blow your nose when you're suffering from a cold, as this rids the body of surplus mucus, helping you to decongest.[2] As a compromise, try to only blow your nose when absolutely necessary Drink honey and lemon tea. This is a simple yet effective cold relief remedy that has been around for a long time. To make the honey and lemon tea, boil some water, pour it into a mug, stir in 1 1/2 tablespoons of lemon juice and two teaspoons of honey. The honey will help soothe your sore throat, while the lemon helps to clear up a blocked nose. The vitamin C is also good for fighting infections generally. Flush out your sinuses. One treatment for nasal decongestion which has become very popular in recent years is the practice of flushing out the sinuses with a Neti pot. The Neti pot contains a saline solution which is poured in one nostril and out the other. This thins the mucus in the nasal passages, allowing it to be flushed away. The saline solution can be purchased at most drug stores, or you can make your own. For medication consult online in private.